Mathematical formulation to predict the harmonics of the superconducting Large Hadron Collider magnets. II. Dynamic field changes and scaling laws
A superconducting particle accelerator like the LHC (Large Hadron Collider) at CERN, can
only be controlled well if the effects of the magnetic field multipoles on the beam are
compensated. The demands on a control system solely based on beam feedback may be
too high for the requirements to be reached at the specified bandwidth and accuracy.
Therefore, we designed a suitable field description for the LHC (FIDEL) as part of the
machine control baseline to act as a feed-forward magnetic field prediction system. FIDEL …
only be controlled well if the effects of the magnetic field multipoles on the beam are
compensated. The demands on a control system solely based on beam feedback may be
too high for the requirements to be reached at the specified bandwidth and accuracy.
Therefore, we designed a suitable field description for the LHC (FIDEL) as part of the
machine control baseline to act as a feed-forward magnetic field prediction system. FIDEL …
Mathematical formulation to predict the harmonics of the superconducting Large Hadron Collider magnets: III. Precycle ramp rate effects and magnet characterization
The Large Hadron Collider (LHC) at CERN is equipped with a feed-forward control system
known as the field description for the LHC (FiDeL) which is designed to predict the magnetic
field and its multipoles, hence reducing the burden on beam based feedback. FiDeL
consists of a physical and empirical parametric field model based on magnetic
measurements at warm and in cryogenic conditions. It is particularly critical during beam
injection when the field decays and at the beginning of acceleration when the field snaps …
known as the field description for the LHC (FiDeL) which is designed to predict the magnetic
field and its multipoles, hence reducing the burden on beam based feedback. FiDeL
consists of a physical and empirical parametric field model based on magnetic
measurements at warm and in cryogenic conditions. It is particularly critical during beam
injection when the field decays and at the beginning of acceleration when the field snaps …